Rafal Mlynski, Ph.D. (Eng.), is Assistant Professor at the Department of Vibroacoustic Hazards at the Central Institute for Labour Protection - National Research Institute in Warsaw, Poland. He has a PhD degree in technical sciences, which he obtained in 2011. In his research he works on issues related to noise protection and sound perception. One of his focuses is impulse noise, including the testing and the use of hearing protectors. He measures noise parameters, evaluates exposure to noise and selects hearing protectors. His main activity is also testing the parameters of the hearing protectors, both in the laboratory and in real conditions. He studies the perception of the direction from which the sound comes, including auditory danger signals. He designs systems supporting safe work performance and new types of hearing protectors, including those equipped with electronic systems.